Portion of a battery for a portable electronic apparatus



FIG. 1 is a top, front and right side perspective view showing my new design;

FIG. 2 is a bottom, front and right side perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof, the left side being a mirror image thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken lines showing of the rear portion of the battery is for illustrative purposes only and forms no part of the claimed design. 

I claim the ornamental design of a portion of a battery for a portable electronic apparatus, as shown and described. 